Device for closing the slits of packing-rings



- y L. RASCH. DEVRCE FOR. CLOSING '[HE SUTS 0F PACKING RINGS APPLICATIONFILED APR. 5. 1916.

1,332,952. Patented Mar. 9,1620.

1731 0122 0 i".- 1 udui/ic ,Ra/s 077/.

curing the closure member 7 UNITED STATES PATENT orn'roE.

LUDVIK RASCH, 0F CHRISTIANIA, NORWAY.

DEVICE FOR CLOSING THE SLITS .01? PACKING-RINGS.

T 0 all to hem it may concern Be it known that I, LUDVIK Riisoii, asubject of the King of Norway,

' city of Christiania, Norway,

residing have invented certain new and useful Improvements in Devicesfor Closing the Slits of Packing-Rings, of which the following is aspecification.

V This invention relates to improvements in closures for packing ringslits, and more particularly to that kind of closure member, which maybe spring-pressed or yielding and which is providedvwith portionslocated upon both sides of the ring and contacting with the cylinderwall to prevent access of the pressure medium to said sht.

One of the main features of the invention resides in a novel means forobtaining the spring action for keeping the closure memberin contactwith the cylinder wall or piston rod, this result being herein obtainedby sering itself.

This and other features of, the invention will bestbe understood fromthe follow ng;

description, taken 1n connection with the accompanying drawings, of twoillustrated embodiments of the invention, it being understood that theinvention in its true scope is definitely set forth by the claims.

In the drawings:

Figure l shows the top portion of a piston with the closure member ofone embodiment of my'invention in front view and in section,

V on line 1-'1;

'Fig. 2 is a sectional view on line 22 of Fig. 1.

Referring to the figures, the closure member 1 is lodgedin arecess orcavity 2 provided in the piston body,

provided with a groove 3 to receive the packsaid member being ing ring4, thereby forming the closure part-s (Sand 7 for closing the slit 5 attop and bottom. s

Inthis embodiment of my invention the closure'member is secured orattached to the packing ring by means of a threadedbolt10, which isscrewed into a correspondingly threaded aperture provided in the closuremember 1. Said bolt is provided with a head 11,'which is received inarecess 12, pro-- vided thereforin the packing ring 4;, and said recesscommunicates with the meansof a slot 13; hebolt'lowill preferably beturned down at 14 to enable it to be in the having a '11 of the bolt tothe packing slit 5 by The outer surfacesof the closure parts 6 and 7 ofthe closure member should contact with the cylinder wall, andconsequently the closure member 1 must be adjusted in respect to thepacking rlng L, in such manner that the outer surfacesof said closureparts 6 and ,7 shall be flushed wlth the outer surface of the packingring. For this purpose the head with a groove 15, to enable said bolt tobe,

10 will preferably be provided Specification of Letters Patent.-Patented Mar. 9, 1920. Application filed April '5, 1916. Serial No.39,222.

screwed more or less into the closure member 7 1, by means of a screwdriver or suitable implement. This ad ustment being efi'ected, thepacking rlng 4 1s disengaged from the bolt 10, the block 1 is removedfrom the rea the nut 16 is screwed down or set cess and tightlyagainst'the inner surface of the block its position, whereupon, theparts are again put in place. r V v The block 1'is prepared as follows:v

The recess 2 in the body of the piston is made slightly tapered at thebottom thereof, and the block 1 is also correspondingly taperedsufficiently to enable said block to be firmly fixed in the recess 2 bygiving said block a blow with a hammer, As the block thus forms a fixedpart of the body of the piston it can now be worked or finished ofi'simultaneously with the piston, both as regards the outer surface aswell as regards the v forming of the groove for the packing ring; WVhentheblock has been'formed and f1 ished it is extracted from the recess 2by screwing a metrically opposed to the first one, in said member 1,through which asecond bolt may be inserted, to exert an even pressureonthe block Lin-forcing the latter out of the res cess 2, after said blockhas been finished.

The secondbore Wlll preferably be normally closed by a bolt 17, as shownin Fig, 2, or a second bolt, similar to the bolt 10 may be provided forthispurpose, and in such case the free end of the packing ring will beprobolt through the threaded aper-' ture intended to receive the bolt10,.the end the slot to receive the slit vided with a recess to receivethe head of said bolt, but in that event the slot 13 will be extended tothe slit 5 with the full width of the recess, so as to allow the end'or"the packing ring l to. move freely as it wears My lnvention has thisgreat advantage,

among others, over similar devices heretofore used namel Y that it is soconnected to the packlng r ng, that 1t exerts the same pressure a'galnstthe inner surface or the cylinder as does the packing ring, and consequently said closure member will not wear a groove in the cylinderwall, and scoring of r the cylinder from this cause is thereby avoided.V a

It will be apparent equally applicable to cylinder constructions inwhich the packing ring is mounted in the wall of the cylinder, insteadof in the piston.

Claims.

' 1. The combinationof a piston provided a packing r ng 7 sion to permitmovement or said packing ring relatively to said closure member in onedirection, while preventing movement or said packing ring relatively tosaid closure member in the opposite'direction.

2. The combination of a piston provided with an annular groove; packingring positioned in said groove and provided with a slit; alclosuremember provided with a slot to receive the slit portion of said packingring and closing said slit at top and bot tom; and means connecting afree end of said packing ringto said closure member and having provisionto permit movement of said free end of the piston ring relatively tosaid closure member circmnrerentially of the piston.

3 The combinationof a piston provided vith an annular groove; a packingring positioned in said groove and provided with a slit; a closuremember provided with a slot to receive the slit portion of said packingring and closing said slit at top and a bottom, the bottom of the slotin said closure member being spaced from the inner face of said packingring; and connecting means connecting said packing member and havingprovision relatively to adjust the position of said packing ring andclosure member transversely of the piston.

' 4. The combination of a piston provided with an annular groove; apacking ring positioned in said groove and provided with a sli a closuremember provided with a portion of the packing ring and closing said slitat top and'bottom; connectingmeans connecting said packing that myinvention is ring and closure and closure member transversely of thepissurfaces into the means to prevent outer surfaces of ton; to bringtheir outer same plane; and locking relative movement of the said pistonringand closure member out of said plane away from the center of thepiston, iwhile permitting relative movement of the outer surfaces ofsaid Jiston rin and closure member inwardly toward the center 'of thepiston.

5. TllGCOn'lblHiltlOlI of aipiston provided with an annular groove; apacking ring positioned in said groove and provided with a slit; arecess provided in the wall of said piston,said recess intersecting saidgroove; a closure member adapted to be said recess and provided with aslot to receive the slit portion of said packing ring and closing saidslit attop and bottom; a

bolt having screw threaded engagement with i said closure member and ahead at its other end; an opening in the piston ring adjacent the slitin the latter and embracing said bolt with a sliding fit; a recess insaid piston ring conununicating with said opening, to receive the, headof said bolt; and a nut on the screw threaded end of the latter. v

6. The combination of a, piston provided with an annular groove; apacking ring positioned in said groove and, provided with a-slit;arece'ss provided in the wall oli said pistomsaid recess intersectingsaid gr [Zvega [closure member adapted, to be .pos'itibned in,

said'recess and provided with a'slot to receive the slit portion of saidpacking ring and closing said slit at top and'bottom'; a bolt havingscrew threaded engagement with said closure member and a head at itsother end; an opening in the piston ring adjacent the slit in the latterand embracing said bolt with a sliding fit, said opening communicatingwith the slit of the piston ring; a recess in said piston ringcomnunicating with said. opening, to, receive the head of said bolt; anda nut on of the latter.

7. The combinationor' a piston provided with an (annular 1 groove; apacking ring positioned in said groove and provided with positioned in Vthe screw threaded end a slit; a recess provided in the wall of saidvpiston, said recess intersecting saidgroove; a closure member adapted'to"be positioned in said recess and provided" with aslot to receive theslit portionof said and closing said slit bolt having screw threadedengagement with said closure member and a head'atits other end 1 anopening in the piston ring adjacent the slit in the latter and embracingsaid bolt with a sliding fit, said opening tended longitudinally ofthepistonfl' ing to permit relative movement or the latter and said boltcircum ferentially of the piston .a

packing ring; at top and bottom 5 a being: eX-

wvith an annular groove;

recess in said piston ring with said opening, toreceive the head of saidbolt; and a nut on the screw threaded end of the latter. 7

8. The combination of a piston provided a packing ring within saidgroove and provided with a slit; a closure member provided with a slotto receive the slit-portion of said packing ring and closing the slit attop and bottom; and connecting means connecting said packing ring andclosure member and having provision for relatively adjusting saidpacking ring and closure member, transversely of the piston.

9. The combination of a piston provided with an annular groove; apacking ring within said groove and provided with a slit;

a closure member provided with a slot to receive said slit-portion ofsaid packing ring and closing the slit at top and bottom; connectingmeans connecting said packingring and closureumember and havingprovision for relatively adjusting said packing ring and closure membertransversely of the communicating aslot to receive the slit-portion ofthe pack ing ring. and closing said slit at top and 1 bottom; meansconnecting said closure member to said packingring and comprising meansrelatively to adjust said closure member and packing ring to bring theirouter surfaces into the same plane; and locking means cooperating withsaid adjusting meansto prevent the outer surface of the piston ring frommoving outwardly beyond the plane containing the outer surface orsaidclosure member.

In testimony whereof I my signature in presence of two w tnesses. V

' LUDVIK R-ASCH.

Witnesses N. G. TAUDBERG,

HEDVIG Srnrrnns.

